Fix typo in a comment.

git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@97 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/dns/run_unittests.cc

@@ -32,7 +32,7 @@ main(int argc, char* argv[])
     CppUnit::TestRunner runner;
     CppUnit::TestResult controller;
 
-    // Add a listener that colllects test result
+    // Add a listener that collects test result
     CppUnit::TestResultCollector result;
     controller.addListener( &result );